18 June 2004 Near-infrared optical gain and stimulated emission in organic-compound-doped polymer waveguides
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Abstract
We have successfully incorporated a near-infrared-emitting compound, 2-(6-(4-Dimethylaminophenyl)-2,4-neopentylene-1,3,5-hexatrienyl)-3-methyl-benzothiazolium Perchlorat, into poly(1-vinyl-2-pyrrolidone)-base planar waveguides. The variable-stripe-length method is employed to deduce the net gain coefficient of the waveguides, 1 cm in length, doped with 0.5 wt.% of the compound. The gain spectroscopy has revealed a moderate net modal gain of 2.6 cm-1 at 820 nm for the pump fluence of 22.6 μJ/cm2 (3.8 kW/cm2). The waveguides have exhibited lasing at 820 nm when they are transversely photoexcited at 532 nm with a nanosecond Nd: YAG laser. The Fresnel reflection at the polymer-air interfaces acts as a low-finesse Fabry-Perot cavity. The threshold for lasing has been found to be 24.5 μJ/cm2 (4.1 kW/cm2).
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Takeyuki Kobayashi, Takeyuki Kobayashi, Jean-Baptiste Savatier, Jean-Baptiste Savatier, Grace Jordan, Grace Jordan, Werner J. Blau, Werner J. Blau, Yasuhiro Suzuki, Yasuhiro Suzuki, Toshikuni Kaino, Toshikuni Kaino, } "Near-infrared optical gain and stimulated emission in organic-compound-doped polymer waveguides", Proc. SPIE 5351, Organic Photonic Materials and Devices VI, (18 June 2004); doi: 10.1117/12.532907; https://doi.org/10.1117/12.532907
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